Billabong Women's Grandpa Hat Our slouchy, retro-inspired Grandpa Hat flaunts soft 100% cotton corduroy with an unstructured, medium profile. The 5-panel design, adjustable snapback and discreet exterior branding merge style with wearable comfort. 100% Cotton Corduroy Grandpa hat 5 Panel, Medium profile, Unstructured Adjustable plastic snapback closure Exterior branding Materials 100% Cotton